Air Quality Forecast Guidance

Displayed below are NOAA-EPA Air Quality Forecast Guidance values for
latitude: 46.94 N, longitude: 121.47 W.
Ozone concentrations are presented in parts per billion (PPB).
Public comments and suggestions are encouraged.
A FAQ page is available.
More information...
24Hr Maximum
Ending
Maximum 1 Hour Average Ozone
Concentration (PPB)*
Maximum 8 Hour Average Ozone
Concentration (PPB)*
Tomorrow
(Ending 10/04, 4Z)
33
31
*Due to grid interpolation methods, the maximum 1- and 8-hour ozone concentration values may have
values slightly higher or lower than those of the corresponding hourly ozone concentrations.

Ozone
Ending Time
1 Hour Average Ozone
Concentration (PPB)
12Z Model Run
8 Hour Average Ozone
Concentration (PPB)
12Z Model Run
Tue, 03 Oct  01 PM
32
24
Tue, 03 Oct  02 PM
33
26
Tue, 03 Oct  03 PM
32
28
Tue, 03 Oct  04 PM
30
29
Tue, 03 Oct   05 PM
30
30
Tue, 03 Oct   06 PM
30
31
Tue, 03 Oct   07 PM
28
31
Tue, 03 Oct   08 PM
23
30
Tue, 03 Oct   09 PM
23
29
Tue, 03 Oct   10 PM
24
28
Tue, 03 Oct   11 PM
26
27
Wed, 04 Oct   12 AM
25
26
Wed, 04 Oct   01 AM
24
26
Wed, 04 Oct   02 AM
27
25
Wed, 04 Oct   03 AM
28
25
Wed, 04 Oct   04 AM
29
26
Wed, 04 Oct   05 AM
26
26
Wed, 04 Oct   06 AM
27
27
Wed, 04 Oct   07 AM
25
27
Wed, 04 Oct   08 AM
26
27
Wed, 04 Oct   09 AM
30
27
Wed, 04 Oct   10 AM
30
28
Wed, 04 Oct   11 AM
29
28
Wed, 04 Oct   12 PM
29
28
Wed, 04 Oct   01 PM
28
28
Wed, 04 Oct   02 PM
27
28
Wed, 04 Oct   03 PM
27
28
Wed, 04 Oct   04 PM
25
28
Wed, 04 Oct   05 PM
25
27
Wed, 04 Oct   06 PM
27
27
Wed, 04 Oct   07 PM
25
27
Wed, 04 Oct   08 PM
23
26
Wed, 04 Oct   09 PM
24
25
Wed, 04 Oct   10 PM
24
25
Wed, 04 Oct   11 PM
22
24
Thu, 05 Oct   12 AM
21
24
Thu, 05 Oct   01 AM
21
24
Thu, 05 Oct   02 AM
24
23
Smoke
Ending Time
(Local Time)
1 Hour Surface Smoke (µg/m³)
06Z Model Run
1 Hour Column-Integrated
Smoke (µg/m³)
06Z Model Run
Tue, 03 Oct  01 PM
0
0
Tue, 03 Oct  02 PM
0
0
Tue, 03 Oct  03 PM
0
0
Tue, 03 Oct  04 PM
0
0
Tue, 03 Oct  05 PM
0
0
Tue, 03 Oct  06 PM
0
0
Tue, 03 Oct  07 PM
0
0
Tue, 03 Oct  08 PM
0
0
Tue, 03 Oct  09 PM
0
0
Tue, 03 Oct  10 PM
0
0
Tue, 03 Oct  11 PM
0
0
Wed, 04 Oct  12 AM
0
0
Wed, 04 Oct  01 AM
0
0
Wed, 04 Oct  02 AM
0
0
Wed, 04 Oct  03 AM
0
0
Wed, 04 Oct  04 AM
0
0
Wed, 04 Oct  05 AM
0
0
Wed, 04 Oct  06 AM
0
0
Wed, 04 Oct  07 AM
0
0
Wed, 04 Oct  08 AM
0
0
Wed, 04 Oct  09 AM
0
0
Wed, 04 Oct  10 AM
0
0
Wed, 04 Oct  11 AM
0
0
Wed, 04 Oct  12 PM
0
0
Wed, 04 Oct  01 PM
0
0
Wed, 04 Oct  02 PM
0
0
Wed, 04 Oct  03 PM
0
0
Wed, 04 Oct  04 PM
0
0
Wed, 04 Oct  05 PM
0
0
Wed, 04 Oct  06 PM
0
0
National Weather Service Air Quality Program Page
Environmental Protection Agency AirNow Forecast Page
Graphical Air Quality Forecast Guidance
FAQ

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